1440507438 has 12 divisors (see below), whose sum is σ = 3121099488. Its totient is φ = 480169140.

The previous prime is 1440507391. The next prime is 1440507449. The reversal of 1440507438 is 8347050441.

1440507438 is a `hidden beast` number, since 144 + 0 + 507 + 4 + 3 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40014078 + ... + 40014113.

It is an arithmetic number, because the mean of its divisors is an integer number (260091624).

Almost surely, 2^1440507438 is an apocalyptic number.

1440507438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1440507438 is an abundant number, since it is smaller than the sum of its proper divisors (1680592050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1440507438 is a wasteful number, since it uses less digits than its factorization.

1440507438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80028199 (or 80028196 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 1440507438 is about 37954.0174158152. The cubic root of 1440507438 is about 1129.3758628131.

Adding to 1440507438 its reverse (8347050441), we get a palindrome (9787557879).

The spelling of 1440507438 in words is "one billion, four hundred forty million, five hundred seven thousand, four hundred thirty-eight".